Odd Exception when trying to deduce type of Option field

[Artie Pesh-Imam]

Hey guys,

Im getting an odd exception when trying to deploy the schema during our test runs:

Caused by: java.lang.RuntimeException: Could not deduce Option[] type of field 'versionNumber' of class com.cx.Core2Common.schema.TranscodingJob

        at scala.sys.package$.error(package.scala:27)

        at scala.Predef$.error(Predef.scala:66)

        at org.squeryl.internals.FieldMetaData$$anon$1.build(FieldMetaData.scala:441)

And here's the related case class:

case class TranscodingJob(@Column("uuid") id: TranscodingJob.Id,

                          owner: UserUUID,

                          data_object_uuid: DataObjectUUID,

                          status: TranscodingStatus.TranscodingStatus,

                          created_on: Timestamp = new DateTime,

                          modified_on: Timestamp = new DateTime,

                          version: Option[Long] = None) extends KeyedEntity[TranscodingJobUUID] {

  def uuid = id

}

And the schema def

  val transcodingJobs = table[TranscodingJob]("transcoding_jobs")

  on(transcodingJobs)(

    (t) => declare(

      t.id is (unique, dbType(uuidDbType)),

      t.data_object_uuid is (dbType(uuidDbType)),

      t.owner is (dbType(uuidDbType)),

      columns(t.owner, t.status) are (indexed)

    )

  )

Any ideas? 

[Luis Ángel Vicente Sánchez]

Try adding a default constructor that initializes all option fields to some(value)

[Artie Pesh-Imam]

Well, I could work around it through my domain model but it just seems odd that Squeryl can't determine the type of the field version, since that type parameter is being specified. 

[Tomer Gabel]

It's a JVM type system limitation. The field is not part of the class definition though - assuming this not a paste-before-refactoring issue, perhaps you're using a compiler plugin or some sort of AOP framework?

[David Whittaker]

Hi Artie,

What version of Squeryl are you using?  Can you verify that scalap is in your apps classpath?  I also noticed that 'versionNumber' doesn't correspond to any of the fields in your model class... it might be helpful to post a small runnable test case to github showing the error.

-Dave